robf Posted April 14, 2011 Report Share Posted April 14, 2011 Hi all I am new to. All this so please excuse what might be an obvious question I have been looking at the Puma in issue 17 of Classic Dirt Bike and noticed that the rear hub appears to have the 'brake' on the right hand side. I have just bought a 325 and would like to convert to a LH shift and thought that seemed a better solution than running a cable to the standard hub. Can anyone tell me more like what the hub is off and how much hassle it might be to fit it. Thanks .... Rob Quote Link to comment Share on other sites More sharing options...
mrb505 Posted April 14, 2011 Report Share Posted April 14, 2011 (edited) Later model Alpina wheel by the looks of it but could be Pursang etc as long as the drum is on the right side, should fit straight on if the axle is the same diameter, if not change the wheel bearings to suit, would need a brake anchor point on the swingarm and maybe different axle spacers Reasons why it is done is to get rid of the cable and a larger drum 140mm? instead of the original 125mm Edited April 14, 2011 by mrb505 Quote Link to comment Share on other sites More sharing options...
woody Posted April 14, 2011 Report Share Posted April 14, 2011 Don't think it is a Pursang hub as there aren't enough sprocket bolts. You could try a TY175/250 twinshock rear wheel or a Montesa Cota 247, both have brake/sprocket on opposite sides. However, I have a Sherpa rear brake that works perfectly well with a cable from a R/H side pedal. The only mod I made was to make my own pedal as I wasn't keen on the feel of the alloy Sherpa one, and when I lowered the footrests I couldn't reach it properly anyway. It still uses the original pivot point, just reshaped for the new footrest position. I can lock the rear wheel without problem. Quote Link to comment Share on other sites More sharing options...
mrb505 Posted April 15, 2011 Report Share Posted April 15, 2011 Looks to be a Alpina front hub as well which is 140mm instead of 125mm, later Pursang's had 125mm front hubs so probably both front and rear are Alpina. Mick Andrews seemed pretty impressed with brakes let alone the rest of the bike. I think Pursang and Alpina rear hubs are both 9 hole sprockets, the Puma bike probably has left every 3rd bolt out. Quote Link to comment Share on other sites More sharing options...
woody Posted April 15, 2011 Report Share Posted April 15, 2011 You could be right with the hubs, I've never seen later Alpina hubs Most of the Puma bikes run the original spec hubs, they are machined out to take a steel liner. The shoes would be fitted with oversize liners, probably of a material that gives a better feel for trials and skimmed to fit for a much bigger contact surface. I've tried 3 or 4 with Sherpa hubs and the brakes were perfect on all of them, including those operated by R/H pedal with the cable. Quote Link to comment Share on other sites More sharing options...
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